Fig. 12
The ratio of the column density estimates and the true values in a sample of six Cloud II cores with N > 5 × 1022 cm-2. The dotted, dashed, and solid lines correspond to N(250), N(350), and N(500), respectively, all calculated at the 18.3″ resolution. The results are shown for cores without (left frame) and with internal heating sources (right frame).
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